How does this relate to 'website and forum'? I've asked a moderator to move it.
I have measured the values that the photoresistor receives when it is receiving light and the values go from up to down
Please explain this better.
If you used code to measure, please show the code that you used (and use code tags)
Type [code]
Paste your code after that
Type [/code] after the pasted code
Draw a little diagram, take a photo or scan it and post it here.
If it was not connected to the Arduino when you were doing the measurement (you e.g. used a multimeter), that's sufficient. Indicate how you think it should be connected to the Arduino.
If it was connected to the Arduino when you were doing the measurement, indicate how it was connected.